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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2009, vol. 103, p. -

Measurement of B→K*(892)γ branching fractions and CP and isospin asymmetries

Aubert B., Karyotakis Y., Lees J. P., Poireau V., Prencipe E., Prudent X., Tisserand V., Garra Tico J., Grauges E., Martinelli M., Palano A., Pappagallo M., Eigen G., Stugu B., Sun L., Battaglia M., Brown D. N., Kerth L. T., Kolomensky Yu G., Lynch G., Osipenkov I. L., Tackmann K., Tanabe T., Hawkes C. M., Soni N., Watson A. T., Koch H., Schroeder T., Asgeirsson D. J., Fulsom B. G., Hearty C., Mattison T. S., McKenna J. A., Barrett M., Khan A., Randle-Conde A., Blinov V. E., Bukin A. D., Buzykaev A. R., Druzhinin V. P., Golubev V. B., Onuchin A. P., Serednyakov S. I., Skovpen Yu I., Solodov E. P., Todyshev K. Yu, Bondioli M., Curry S., Eschrich I., Kirkby D., Lankford A. J., Lund P., Mandelkern M., Martin E. C., Stoker D. P., Atmacan H., Gary J. W., Liu F., Long O., Vitug G. M., Yasin Z., Zhang L., Sharma V., Campagnari C., Hong T. M., Kovalskyi D., Mazur M. A., Richman J. D., Beck T. W., Eisner A. M., Heusch C. A., Kroseberg J., Lockman W. S., Martinez A. J., Schalk T., Schumm B. A., Seiden A., Wang L., Winstrom L. O., Cheng C. H., Doll D. A., Echenard B., Fang F., Hitlin D. G., Narsky I., Piatenko T., Porter F. C., Andreassen R., Mancinelli G., Meadows B. T., Mishra K., Sokoloff M. D., Bloom P. C., Ford W. T., Gaz A., Hirschauer J. F., Nagel M.

We present an analysis of the decays B0→K*0(892)γ and B+→K*+(892)γ using a sample of about 383×106 BB̄ events collected with the BABAR detector at the PEP-II asymmetric energy B factory. We measure the branching fractions B(B0→K*0γ)=(4. 47±0.10±0.16)×10-5 and B(B+→K*+γ)=(4. 22±0.14±0.16)×10-5. We constrain the direct CP asymmetry to be -0.033<A(B→K*γ)<0.028 and the isospin asymmetry to be 0.017<Δ0-<0.116, where the limits are determined by the 90% confidence interval and include both the statistical and systematic uncertainties. © 2009 The American Physical Society.